1.docker ps  找出容器的唯一標識

2.docker exec -it ad9b8c3e20f0 /bin/bash  進入Docker容器執行環境

3.開始重置gitlab管理員使用者密碼

root@47:/# gitlab-rails console production
Loading production environment (Rails 4.2.10)
irb(main):001:0> user=User.where(id:1).first
=> #<User id:1 @root>
irb(main):002:0> user.password='123456'
=> "123456"
irb(main):003:0> user.password_confirmation='123456'
=> "123456"
irb(main):004:0> user.save!
Enqueued ActionMailer::DeliveryJob (Job ID: 86227e1d-cc49-44de-9179-e7c20a8b03f6) to Sidekiq(mailers) with arguments: "DeviseMailer", "password_change", "deliver_now", gid://gitlab/User/1
=> true
irb(main):005:0> 

4.至此，管理員使用者名稱重置完畢，重置後的密碼為12